Iowa 401(k) plans

Name: Iowa 401(k) plans: assets, participants and plan-paid fees
Creator: 401(k) Monitor
License: https://401kmonitor.com/licence/

657

Large 401(k) plans headquartered in Iowa are in 401(k) Monitor’s published set, holding $52.3B in total, led on headcount by Principal Ease 401(k) Plan with 161,040 active participants. Computed from DOL Form 5500 filings, plan years 2020–2025.

State means the sponsor’s address on the filing, not where employees work. Our published set covers 57,824 of the 57,824 large plans in the form-year-2024 DOL EFAST2 bulk data, so this is the largest-plan end of Iowa, not a census of it.

13 of the biggest 401(k) plans headquartered in Iowa

The plans this site submits to search engines come first, then the rest; each group is ranked by active participants, the people still building up a balance. plan years 2020–2025, DOL EFAST2 bulk data. Assets in USD. Every plan links to its full fact page.
#	Plan	City	Active participants	Assets
1	The Hy-Vee And Affiliates 401(k) Plan	West Des Moines	55,933	$3.1B
2	Casey's General Stores 401(k) Plan	Ankeny	36,804	$514.4M
3	Iowa Health System Section 401(k) Retirement Savings Plan	West Des Moines	25,777	$3.3B
4	The Rsm US LLP Retirement Plan	Davenport	14,521	$3.4B
5	The Principal Select Savings Plan	Des Moines	12,662	$4.6B
6	Thrivewise Pooled Employer Plan	Des Moines	8,218	$996.9M
7	Transamerica 401(k) Retirement Savings Plan	Cedar Rapids	7,764	$2.7B
8	Midamerican Energy Company Retirement Savings Plan	Des Moines	7,624	$2.0B
9	Hni Corporation 401(k) Plan	Muscatine	6,819	$1.5B
10	The Architect Retirement Pep	West Des Moines	6,239	$146.2M
11	Fareway Stores, Inc. 401(k) Profit Sharing Plan	Johnston	5,926	$401.4M
12	Ruan Employees' 401(k) Savings Plan	Des Moines	5,403	$299.6M
13	Annett Holdings, Inc. Employee Savings And Profit Sharing Plan	Des Moines	5,008	$99.9M

Every Iowa plan, by size

The table above is the top of the list. These 5 pages hold all 657 plans on file from Iowa, split by how many people are in them, each ranked by active participants.

100 to 499 participants · 443 plans
Pages1 2
500 to 999 participants · 108 plans
1,000 to 4,999 participants · 89 plans
5,000 or more participants · 17 plans

401(k) fees in Iowa vs the national median

Plan-paid administrative cost per participant, plan years 2020–2025 Form 5500 filings. Medians over our published set, not the full universe.
Iowa medianAcross the 634 Iowa plans in our set with usable fee data.	$172.99 per participant
National medianAcross 54,783 published plans with usable fee data.	$122.17 per participant
Difference	$50.82 above the national median

Plan-paid means fees the plan itself reports on Schedule H; many employers pay providers directly, which a filing reports as $0. How to judge your own plan: are your 401(k) fees high?

Useful links

All states
Plan counts, fees and largest plans, state by state.
The largest 401(k) plans in the US
The national ranking these state tables are drawn from.
Average 401(k) fees by plan size
Fees depend on plan size more than on state.

Cite: 401(k) Monitor, “Iowa 401(k) plans: largest plans and fees”, computed from DOL EFAST2 Form 5500 bulk data, plan years 2020–2025, published set of 57,824 plans, data as of July 28, 2026.